Detonation Onset in Non-uniform Polydispersed Mixtures

The paper presents the results of theoretical investigations of combustion and detonation onset in non-uniform polydispersed mixtures. The problems of fuel droplets atomization, evaporation and combustion being the key factors for ignition delays and shock waves attenuation evaluation in heterogeneous mixtures and the non-equilibrium effects in droplets atomization and phase transitions were taken into account. The effects of droplets size non-uniformity and spatial distribution non-uniformity on mixture ignition and flame acceleration were investigated and compared for two different methods of initiation of detonation: mild initiation (spark ignition and deflagration to detonation transition (DDT)) and strong initiation (strong shock wave).

Keywords:

combustion , onset , non- uniform , droplet.